When your car's Check Engine light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap.
If you experience any bleeding period after this 20 days, it will probably be the real period. This normally comes at about 4 to 6 weeks after the miscarriage.
Duration of a Miscarriage. Miscarriages can last from one day to about 3 weeks in duration. It depends on various factors like the time required by the body to completely eliminate the fetal tissues etc. For some women the bleeding and cramping stops in a week, however, some can experience it for over 3 weeks.